Improvement in cotton-gins



I. F. sndwu.

Gntton-Gins.

Patented Feb. 10. 1374.

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UNITED STATES Arum Orrron ISRAEL F BROW N, OF NEYV LONDOX, CONNECTICUT.

IMPROVEMENT IN COTTON-GINS.

Specification forming part of Letters Patent No. 147,364, dated February 10, 1874; application filed a December 9, 1873.

To'ttll whom it may concern:

Be it known that I, ISRAEL F. BROWN, of New London, in the county of New London and State of Connecticut, have invented an Improved Cotton-Gin Shaft, of which the following is a specification:

Figure 1 is aside view of my improved cotton-gin shaft, showing the saws and intervening washers in cross-section. Fig. 2 is a crosssection of the shaft, the line 0 c, Fig. 1, indicating the plane of section.

Similar letters of reference indicate corresponding parts.

The object of this invention is to substitute, for the more expensive method heretofore em- /ployed in properly fitting gin-saws upon their shafts, a more economical and fully as reliable means, and thus reduce the expense of cottongins. My invention consists in constructing the shaft of a prismatic bar square in cross section, and in then turning it 011 a lathe, so as to round and center its corners, or planing off the eornerstrue and concentric, by plaein g them between centers in a planing-machine. This shaft, when fitted through the round 0 holes of the saws, will fit the same as perfectly as will the completely cylindrical shaft, and will, when such saws have internal projections or feathers, as effectually prevent the independent rotation of the saws as can be done by the more expensive customary devices.

In the accompanying drawing, A represents the cotton-gin shaft. B B are'the saws; C C, the washers between the saws. The shaft, where it serves to hold the saws, is left square, and is only put in a lathe or between centers in a planing-machine to round off or true up its corners a a. in conformity with the size of the hole in the saws, an inwardly-projecting feather, I), being left on each saw, as indicated in Fig. 2.

Heretofore it was customary to either square the shaft, and also the hole in the saw, which "as difficult to make with proper exactness, and also expensive, or there was in a round shaft a groove formed for the reception of the feathers b. This involved the expense of turning the entire shaft and grooving the same.

By my process the rough iron bar can be used slightly turned or planed at the corners, and inserted in the saws. Still, though so much cheaper, my plan is fully as reliable as the other.

I claim The combination of the square shaft A, having-the corners a rounded or planed, with the saws B B, which have the inwafilly-projecting feathers b, and the washers C C, substantially as set forth.

ISRAEL F. BROYVN.

Witnesses:

E. '1. BROWN,

'BENJ. H. LEE. 

